Warp stop motion for looms



E. s. STIMPSON. WARP STOP MOTION FOR LOOMS.

Patented Man 14,1922.

APPLICATION FILED JUNE 2. 1921.

4 SHEETS-SHEET I.

m r m. v m.

E. s. STIMPSON.

WARP STOP MOTION FOR Lpoms. APPLICATION FILED JUNE 21 I921.

- Patented Mar. 14, 1922..

4 $HEETSSHEET 2.

E; S. STiMPSON. WARP STOP MOTION FOR LOOMS.

APPLICATION FILED JUNE 2, 192l- 1,409,42 Patented Mar. 14, 1922.

4 SHEETS-SHEET 3- E. s. STIMPSO'N.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED JUNE 2, I921.

Patented Mar. 14,1922;

4 SHEETS-SHEET 4.

In 1! 601 8 W UNITED STATES FAT T arms. 1

'EDWARD s. s'rIMrsoN, or 'I-IOVPEDALE, massacnusnr'rs, AssIGnoR 'ro nearer. CORPORATION, or HOPEDALE, MASSACHUSETTS, A CORPORATION or MAINE.

WARP sror mo'rroivrort Looms.

, Applicationfiled June 2,

To all whom it may concern:

Be it known that L EDWARD S. 'S'r MPsoJ, a citizen of the United States, 'residing'at- Hopedalc, in the county of Worcester and State of Massachusetts, have. inrented' an Improvement 'in Warp Stop 'Mo'tions; for Looms, of which the following description, in connection withthe accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to warp'stop mo tions for looms, whereby upon the occurrence of a warp fault, such for instance, as breakage or undue 'slackness of a warp thread, the loom is stopped.

It is desirable at timesto run the loom without causing stoppage thereof, due-to a warp fault. These occasions arise. for'instance, when a new warp is placedin the loom." At such time it is desirable to run the loom for a time .to condition the warp and bring the warp threads into uniform tension and arrangement for the weaving operation. Such operation 7 without stopping due to a warp fault, may also arise where there has been a"smash or other condition that has disturbed the general arrange-ment and tension of thewarp threads.

The novel features and new combination of parts will best be made clear from the following description in connection with the accompanying drawings, which show one good, practical form of carrying the various features of the invention into practical efi'e'ct. 7 I v In the drawings: I r v Figure 1 is a partial side elevation :of

aloom provided with a warp stop motion embodying the present invention, some of the parts being broken away to show others beyond;

Fig. 2 is a detached perspective view showing more particularly portions of the Warp stop motion devices in separated relation, and the connection between such devices and the loomrstopping mechanism;

Fig. '3 is a perspective view ofonefend portion of the warp stopmotion of-the pres ent invention, showing'tlie feeler carrier removed from operative relation with the drop wires; 7 V 1 Fig. 4 is a fore-ancl-aft' vertical sect-ion through the warp stop motionproper, the drop wires being indicated assupported in nected at 8 to a 'link 9l extenclin in the Specification of Letters Patent. Patented Mar. 1 4, 1922;

1921 serial mer es.

' their raised position by the normal warp threads; v g V I Fig. 5 is: a similar section through the warp-stop motion proper, showing ore particularly thebracesfor bracing the drop wire guides and the feelers.

Asindicate'd in igg lrthe warp stop motion proper is located between the shedding mechanism or heddles and the rear ofthe loom, and'inthe present instance is associated with mechanism actuated. by the lay when-a feeler. is arrested in itsfdetecting movement, to thereby knock-off the shipper and effect loom stoppage. The illustrated form of the mechanism between the warp stop motionproper andthe shipper const-L tutes a good, practical train of mechani m for effecting the desired purpose, but it is to be understood that the invention is not restricted thereto, but that the warp stop motion may be associated with any desirable train of mechanism, which will serve to bring the loom to rest when the detecting movement'of a feeler is stopped by adrop wire. 7 a v v The loom frame 1 'may be of usual construction provided with'a suitable support at the rear portion thereof for the warp beam '2 on which lthewarp threads are wound. Pivotally mounted at the ship-j per 4 which, when the loom is runnin jma beheld inlt'he usualship aer notch. Pivotally mounted at 5 isthe .knoclc-off lever 6, one end 7 ,of'whicl1 bears against the ship per and anotherportionwhereof 'is cona present instance, 'rea'rwardly of the jloo'm, the construction being such theta longi-" tudinal movement of the. "linkl9 rearwardly I will serve to-turn the knock-off lever 6 con traclo c'kwise, Fig. 1, andthereby detach the shipper from its"holding notch, to effect loom stoppage. I I l The link 9 has its rear end connected at 10 to .anarm 11 pivotally supported at 12 tothe loom frame or a bracket 13' secured to the side thereof. Mounted for rocking; movement on the arm 11 is the dog 14:, Fig p 2,, having a pin 15 which extends into the 1 slot 16 of a controller 17 which is secured. on a rocker 18 mounted in a suitable'bearing formed in thefbracket13. The lay l has' tion 21 as indicated in Fig. 1, the'corn struction being such that should the end of the dog 14 be in position for engagement with the hunter 20 as the lay moves back, the rocker arm ll'willbe moved contraclockwise and thereby exert a pull upon the link 9 to effect loom stoppage by knockingoff the shipper. The mechanism so far described is or may be of usual construction, such for instance, as generally. shown and described in the patent to Ambler, Number 885,130, dated April 21, 1908, but so far as the novel features of the present invention are concerned, other forms of transmitting mechanism may be employed between the warp stop motion proper and the loom stopping mechanism for effecting loom stoppage when a feeler is arrested in its detecting movement by a drop wire.

Mounted transversely to the'ioom frame is the rock shaft 22 which may receive a rocking movement from a cam 23 on the roller or cam shaft 24 through a train of mechanism which, in they present instance of the invention, comprises a cam follower 25, Fig. 1, pivotally mounted at 26 at the lower part of the loom,-and having an end portion 27 which bears against the cam 23 under the impulse of a spring 28, one end of which is connected to the cam follower 25 at 29,

and the other end portion of which is cone nected at a fixed point 30. Pivotally connected to the cam follower 25 at 31 is the rod 32, the upper end portion of which is connected at 33 to an arm 34 secured to and extending from the rock shaft 22, the construction being such that upon rotation of the cam 23 the cam follower 25 will be rocked upon its bearing and will be held against the cam by the spring 28 so long as the rock shaft 22 is free for rocking movement clockwise in the present instance.

Secured to the rock shaft 22 is the trans mission arm 35, Figs. 1 and 2, which is con nected by a link 36 with an arm 37 secured to the rocker 18, which, as hcreinbefore described, controls the position of the dog 14.

The construction is such that should the rock shaft 22 be arrested in its rocking movement clockwise, in the presentv instance, under the action, of the spring28, the dog 14 will be positioned to be met by the hunter 20 as the lay goes back, to thereby knockoff the shipper and stop the loom. The train of mechanism which has been described forms a convenient construction for the purposes stated, but if desired, such train of mechanism may be varied withoutjdepartn mg fromthe true scope of the present in vention. i

The loom frame 1. has adjustably secured I thereto at each side of the loom, a bracket the top supporting flange 39 of which is provided with a slot 40, Figs. 2 and 3. Adljustably supported upon the bracket 38gb;

each side of the 100111 is abracket 41which be formed with a slot 42 through which passes the securing bolt 43, the construction being such that the bracket 41 at each side of the loom may be readilyremovcd from or adjustably secured in place upon the braoket38.

The twobrackets 41, one at each side of the loom frame, provide supporting means for the main portions of the warp stop motion. In the present instance each bracket 41 has an upwardly-extending flange portion 44, between which extend the drop wire guides 45, three being shown in the present instance, though any suitable number may be employed. Each of thedrop wire guides 45 extends through the slotted portions4o of a series of drop wires 47, Fig. 3. Thestance of the invention consist of eyes 49 through each of which a warp thread is passed, as indicated in Figs. 1 and 3. 1

Extending betweenthe flanges 44 of the brackets 41 are the warp supporting bars 50, four being shown in the present; illustration, and upon the warp supporting bars 50 the warp threads (a rest as they travel fromthe warp beam toward the front of the loom. If desired, a warp separating or lease rod 51 may extend between and separate alternate v warp threads, andbe held from movement with the threads toward the front of the loom by means of. check cordsor stops 52, Fig. 3.

The drop wire guides 45 are'supportedabove the plane of the warp threads, as in dicatedin Figs. 1 and 3, and the end portions of such guides are detachably secured to the flange portions 44 of the brackets 41. In the present instance of the invention, the

flange portions 44 of, the brackets 41 are recessed at intervalsas at 53, thereby forming lugs 54 against which the end portions of the drop wire guides are held by removable clips, In the present instance of the invention, the removable clips are formed of angular-shaped metal'parts provided with a flange 55 which overlies the end portions of the drop wire guides and each clip'is provided with a securing portion 56 having a slot 57 through which passes a securing bolt 7 58, the construction being such that by loosening'the bolts 58, the clips may be moved from overlying relation with the ends of if the drop' wire guides, so that they maybe readily removed with the dropwires, when,:

for instance, a new warpis tobe drawn in.

' by the members 65.

I loom stoppage.

Associated with each row of drop wires is a feeler which is given a detectingniovement and which, when arrested in such movement by one of the drop wires, effects As hereinbefore stated, it is desirable at times to run the loom without stopping, due to a fault in the warp. and. for this purpose the present invention provides a ,feeler' mechanism which maybe moved from operative relation with the'drop wires at will so that even though a warp thread should break or one or more of such threads :be too slack for good weaving purposes,v the. loom will continue to run so longas the feelermechanism isnot in operative relation with the drop =wires. 4 1

. Each of the flange portions 44 of the brackets a1 is provided'with' guiding :supports 59 which may be-conveniently formed on opposite portions of the flanges 44 and upon such guiding supports rest the side members 60 of a feeleri carrier which may be designated as a whole {LS-61, Figs. 2 and Extending between and secured to the side members 60 of the feeler carrier are-the 66191362, any number of which may be employed, but 7 three beingshown in the present illustration of the invention. I The side members 60 .of ,the feeler carrier .are provided with lug portions, 63, against which are secured the feelers 62 by suitable means such as the securing bolts and nuts 64, the

construction being such that they may be readily secured to forremoved from the side members of the feeler carrler. .The side members 60 of the feeler carrier are connected by a member or bar 65, the end portions of which preferably extend beyond the side members as at-66 to afford engaging portionsv with an, actuator, whereby the feeler carrier may begiven a reciprocating. movement on itsigulding support-s59. In

the present instance? the side members 60 have arms 67 extending therefrom, and porvided with sleeves68 which maybe clamped to the bar 65 by set screws 69, Fig. 2, the

construction being such that the side mem-v bers of the feeler carrier are connected together not only by the feelers 62, but-also .The rock shaft 22 hereinbefore described may be conveniently supported in bearings. 70 formed in the brackets 41, and extending from the rock shaft 22, preferablyvon e at;

each end portionthereof, is an arm 71having an open or bifurcated upper portion 72 in which may be received the, end portion 66 of the member 65, the construct-ion being such that upon rocking movement of the rock shaft 22; the feeler, carrier will be given a reciprocatingmoveineht upon its guiding supports 59 and impart detecting movement to the feelers toward and from the, associated row ofdrop wires. 1

side member 60 of the feler carrier has end bearin'gportions 73 which rest upon one of the guiding supports 59, while the end por tion v66 of the feeleracarrier may be sup-' ported by a shoulderor saddle 74, Fig.-.2, aclj'u'stably mounted on the armsfil, the cone struction being such that the weight of-the feeler carrier is preferably supported by the saddles 74 at one end, and the'other end, by the bearing'portions 73 of theside members60. Thefsaddlesfie are adjustably'se cured tozthe Qarms- 71 Jto'ther'eby enable proper.relationqofthe feelers; and the'asso; ciated parts to be secured? f -The feelers 62 are supported by the feeler carrier above the warp threads, thereby .lessening the space occupied by'the feelermechanism proper in proximity. to thewa-rp;

beam and permitting a ready movement of: the feelers fromtheir operative r'elation with the drop wires to permit the loom -to be run withoiutstopping, due to a warp fault .Thefeelers 62 aremounted abovethewarp threads in an inclined position relative to the. plane of the warp threads, thereby, ell-'- abling. the feelers to be formed .of sufliciently heavy metal to withstand thechecking action of. the drop .wires without bending, and such inc-lined position of the -feeler's alsoprevents the accumulation of lint upon :thefeelers; which might otherwise interfere with the delicate operationofthe m'echa some looms, especially,.those of ,-more than usual width, it may bedesirable to further brace the feelers and also the drop wire guidesfand to this end the feeler car-, rier isprox zidedvwith braces 75 having. notched portions 7.6. Fig. 2. which engage;

the -topje dge:. ,portions of the} feelersr In he I) e inst nce the lfeeler braces 57 may be mounted upon the connecting,mem-. her the ,feelercarrier-by collarsaor sleeves, and secured thereto by-the; set screws f i Extending between the brackets fl isthe brace supporting rod Figa-Q, whichmay be appropriately, I secured to -the brackets by set screws @SO'. 'Mounted upon and ,fixed'to the rod/Z9 the arms 81 whichi'therel may be any suitable number. havingseeu'red theretov thedrop wire guide braces 82 which reception of the drop wire guides 45. I

The feelers have a. dropwireengaging portion whichis given, its detectingv move-; ment. in the. horizontal .pla=ne ofithe dropv wire guides in order that the drop wire guides may support the drop wires directly. in thelpljaiie of detecting movement {of the feelers when vthe latter are arrested by a, fallen drop, By thus backing up the drop wires underithe detecting action of the eels-1S2. were lr P; Wire guid i su fiei i mneaheaas' indicated in for. the

in most cases, for a row of drop Wires, without distorting the drop wires. Inasmuch as the feelers are mounted in an inclined position, as indicated in Figs. 4 and 5, the lower portions of the feelers are cut-away or beveled, to provide an engaging portion in V the horizontal plane of the drop wire guides.

When it is desired to run the loom without stopping, due to a warp fault, the loom attendant lifts the feeler carrier from its operating relation with the drop wires, as indicated in Figs. 2 and 3; and in the present instance, detaches the feeler carrier from its operating means. This he is enabled to do more readily because the feelers are supported by the feeler. carrier above the plane of the warp threads. When the loom has run sufiiciently long to condition the warp threads properly, the attendant has only to return the feelers back to their operative condition with respect to the drop wires.

When the drop wires are supported in their raised position by the warp threads, they should be sufiiciently free of the drop wire guide to permit sensitive response of the drop wires to a slack or broken warp thread, and yet when the drop wire has responded to the warp fault, it should be in sufficiently close engagement with the guide to prevent give or lost motion as the feeler presses against the enlarged portion of the drop wire. To this end each drop wire has the elongated slot 46 which is engaged by the flat guide, and suflicient clearance is provided between the guide and the walls of the slot 46 to permit the drop wire to drop when it fails to be supported by .a warp thread. At its upper end andbacking the enlarged part 48 of the drop wire, the slot 46' is narrowed to substantially fit the guide 45 without material clearance. To this end the wall of the slot adjacent the enlargement 48 is carried closer to the opposite wall of the slot, thereby not only narrowing the slot, but by moving the drop wire laterally toward the feeler, as the drop wire moves into stopping relation with the feeler, the part 48 can be made less large than otherwise would be necessary, thereby lessening the space fore and aft of the loom occupied by the warp stop. motion proper.

[The construction described as a good practical form of the present invention is simple and efficient in operation, and by combining theparts in the relation'described with the feelers above the plane of the warp threads, not only does the warp stop motion not materially interfere with the size of warp beam or wound warp on the beam, but the feelers are rendered accessible and readily removable from' operative position by the loom attendant when it is desired to run the loom without stopping due to a warp fault. The reciprocating movement given'to the feelers in a' path'above the warp threads and by means at each side of'the loom enables the feelers to be made of sufficient rigidity to withstand the arresting action of a drop wire without flexing or bending the feeler, a condition which is further insured by the inclined position of the feelers. An important feature contributing to the advantages flowing from the present invention,

is the fact that the feelers are notonly supported in position above the plane of the warp threads but are mounted on side members of a feeler carrier which is supported and operatedfor ready removal as a whole from operative'position. The side members of the feeler carrier in the preferred form of the invention includebetween them the detecting movements to the feeler carrying frame, and connections between the transverse bar and actuator unobstructing removal of the feeler carrying frame from operative position.

2. In a warp stop motion for looms, the combination of a series of drop wires adapt ed to be supported by the warp threads during weaving, a feeler carrying frame comprising side members having arms projecting therefrom, feelers extending between the side members of the feeler frame and sup ported above the plane of the warp threads, a. transverse reinforcing bar which extends between and is secured to the arms of the side members and has its end portions ex tending beyond the said arms, an actuator, and connections between the actuator and the projecting portions of the transverse reinforcing bar unobstructing removal of the feeler carrying frame and feelers from operative. relation with the drop wires,

3. In a warp stop motion for looms, th combination of a series of drop wires adapt- 'ed to be supported by the warp threads during weaving, a feeler carrying framecomprising side members and feelers extending between the side members, a transverse reinforcingbar extending between and connecting the side-members of the feeler frame, a rock shaft having operating arms, and connections between the operating arms and the transverse reinforcing bar unobstruoting removal of the feeler carrying frame and feel ers from operative; relation with the drop wires. Y

iii)

4. In a warp stop motion for looms, the combination of a series of drop wires adapted to be supported by the warp threads during weaving, a feeler carrying frame comprising side members and feelers extending between the side membrs, a transverse reinforcing bar extending between and connecting the side members of the feeler frame, a rock shaft having operating arms, a supporting saddle adjustably mounted on each of the operating arms for engaging the transverse reinforcing bar when the feeler carrying frame is in operative position, and connections between the operating arms and transverse reinforcing bar unobstructing removal of the feeler carrying frame and feelers at will from operative position.

5. In a Warp stop motion for looms, the combination of a series of drop wires adapted to be supported by the warp threads during weaving, a feeler carrying frame comprising side members, feelers extending between the side members above the plane of the warp threads a transverse reinforcing baron which the side members of the feeler carrying frame are secured, feeler braces mounted on the reinforcing bar and engaging the feelers between the side members, an actuator for the feeler carrying frame, and connections between the actuator and the transverse reinforcing bar which unobstruct removal of, the feeler carrying frame, feelers, transverse reinforcing bar, and braces as a unit from operative position relative to the drop wires.

6. In a warp mop motion for looms, the combination of'a series of drop wires adapted to be supported by the warp threads dur ing weaving, a feeler carrying frame comprising side members, feelers eXtend-ing between the side members above the plane, of the warp threads, a transverse reinforcing bar on which the side members of the feeler carrying frame are secured, a rock shaft, arms secured to the rock shaft and each having an open slotted end for engaging'the trans- Verse reinforcing bar and unobstructing removal of the feeler frame, feelers, and transverse reinforcing rod as a unit from opera- EDWARD S. STI MPSON, 

